As one of Vuo's developers, I work on Vuo's engine (the thing that makes compositions run), work on nodes, and write documentation. You'll see me on the forums answering people's questions about Vuo.
I enjoy using Vuo to make live music visuals. My hope for Vuo is that it will grow into a community of people of diverse backgrounds and identities making lots of different artistic, useful, unique, goofy, beautiful, crafty, wonderful compositions.
Estoy practicando para ser competente en español. Si publicas en el foro en español, trataré de responder en la misma manera.
To reference folders relative to the app, you can use relative paths — you just have to make them relative to that Contents/Resources folder within the app. For example, to access a folder next to the app called "MyImages", use path ../../../MyImages.
If you put that path right into the List Files input port, it will warn you that the path doesn't exist. Use Share Value to bypass that check, as in the attached composition.